Paper sheet type medium stacking device

ABSTRACT

A sheet-type medium stacking device is provided, through which the sheet-type media are stacked piece by piece and a whole stack of media don&#39;t wriggle and draw back. The device includes a piece-by-piece sheet-type media conveying mechanism, an upper conveyor belt, an arc-shaped stacking plate, a movable blocking mechanism, a sensor device and a control unit. An acanthus-shaped protruding rib is arranged at a position, at a distance of a length of one sheet of the sheet-type medium from the movable blocking mechanism, on the arc-shaped surface of the arc-shaped stacking plate, and the acanthus-shaped protruding rib allows the sheet-type media to pass only in a discharging direction. The acanthus-shaped protruding rib is provided with a stop surface and a derivation surface, thus the sheet-type media may only be transmitted along one direction and the movements thereof are irreversible.

This application claims the benefit of priority to Chinese PatentApplication No. 201210448733.2 titled “SHEET-TYPE MEDIA STACKINGDEVICE”, filed with the Chinese State Intellectual Property Office onNov. 9, 2012, the entire disclosure of which is incorporated herein byreference.

TECHNICAL FIELD

The present application relates to a technique for processing asheet-type medium, and particularly to a device through which thesheet-type media are stacked piece by piece and a whole stack of mediadon't wriggle and draw back.

BACKGROUND

A device for identifying financial bills piece by piece is generallyinstalled in the machine for processing financial bills, and after beingidentified piece by piece, the bills which are conveyed piece by pieceare stacked to facilitate withdrawing the bills. For example, in aconventional automatic teller machine, multiple sheets of stackedbanknotes are sorted, conveyed and identified piece by piece, and thenare stacked to be delivered out. At present, in a sheet-type mediastacking device, in which the media are conveyed in a longitudinaldirection, such as a banknote stacking device, a conveyor belt fitsclosely to an arc-shaped plate to convey a single sheet of banknote to aspecific location to be stacked. For example, the first sheet ofbanknote is settled in the specific location, a front end of the secondsheet of banknote is superposed on a tail end of the first sheet ofbanknote, and the first sheet of banknote and the second sheet ofbanknote are clamped by the conveyor belt and the arc-shaped plate tomove forwards together, and the first sheet of banknote stops movingforward when its front end reaches a predetermined blocking member. Thesecond sheet of banknote is driven by the conveyor belt to overcome thefrictional force between the first and second banknotes and continue toslide forward, and stops moving forward until it reaches thepredetermined blocking member. The third sheet of banknote andsubsequent banknotes go through the same process as the first and secondsheets of banknotes, that is, the front end of a subsequent sheet ofbanknote is superposed on the tail end of a previous banknote and thebanknotes are all conveyed to the predetermined blocking member, to bestacked. Eventually, the front ends of all the banknotes are aligned tothe predetermined movable blocking plate, and a whole stack of banknotesare delivered to a predetermined position for an operator.

With the development of technology, the processing speed of a sheet-typemedia processing device is greatly increased, requirements for movementspeeds of the sheet-type media in a device are increased accordingly,however in the above conventional mechanism, for ensuring that the frontend of a subsequent sheet of banknote can be superposed on the tail endof a previous sheet of banknote, the previous sheet of banknote muststop at a predetermined position, the conveyor belt must startinstantaneously at a high acceleration to reach the same linear speed asother devices after the front end of the subsequent sheet of banknote issuperposed on the tail end of the previous sheet of banknote for acertain distance, the conveyor belt is stretched in the process, adriving force for the conveyor belt stops when the banknotes moves tothe predetermined position, and the conveyor belt rebounds to drive thebanknotes to wriggle and draw back, thus front ends of the banknotesform an inverted triangle slope, and the banknotes sent to users in awhole stack show an unsatisfactory banknote stacking effect.

SUMMARY

An object of the present application is to provide a sheet-type mediastacking device for effectively addressing the issue of a whole stack ofmedia wriggling and draw backing.

The sheet-type media stacking device includes:

-   -   a piece-by-piece sheet-type media conveying mechanism configured        to convey a sheet-type medium piece by piece;    -   an upper conveyor belt configured to provide a driving force to        the sheet-type media and arranged around a driving transmission        shaft and a driven transmission shaft which are arranged in a        conveying direction of the sheet-type media;    -   an arc-shaped stacking plate configured to support the        sheet-type media, wherein an arc-shaped surface, fitting closely        to the upper conveyor belt, of the arc-shaped stacking plate        defines a conveying passage for the sheet-type media, a length        of the conveying passage is at least greater than a length of        one sheet of the sheet-type medium in the conveying direction,        and one end of the conveying passage abuts the piece-by-piece        sheet-type media conveying mechanism and is slightly lower than        a delivering outlet of the conveying mechanism, and another end        of the conveying passage forms an outlet for a whole stack of        sheet-type media;    -   a movable blocking mechanism arranged on a section of the        conveying passage close to the outlet and configured to        selectively block the sheet-type media;    -   a sensor device arranged at a tail end of the delivering outlet        of the piece-by-piece sheet-type media conveying mechanism and        configured to detect the arrival and passing of a sheet of the        sheet-type media; and    -   a control unit configured to control the upper conveyor belt to        move or stop moving according to information feedback from the        sensor device;    -   wherein, an acanthus-shaped protruding rib is arranged at a        position, at a distance of a length of one sheet of the        sheet-type medium from the movable blocking mechanism, on the        arc-shaped surface of the arc-shaped stacking plate, and the        acanthus-shaped protruding rib allows the sheet-type media to        pass only in a discharging direction.

Preferably, at least two acanthus-shaped protruding ribs are provided,and the at least two acanthus protruding ribs are arranged in afront-rear order along the discharging direction of the sheet-typemedia.

Preferably, the arc-shaped stacking device includes the following threesections, a section near the piece-by-piece sheet-type media conveyingmechanism forms a rear arc-shaped plate, a section near the outlet formedia forms a front arc-shaped plate, and a middle section forms areversing device.

Furthermore, a recycling conveyor belt assembly and a dischargingconveyor belt assembly are arranged below the reversing device and thefront arc-shaped plate, wherein at least a section of the recyclingconveyor belt assembly fits with a section of the discharging conveyorbelt assembly to form a recycling conveying passage for the sheet-typemedia.

Preferably, one surface, facing to the movable blocking mechanism, ofthe acanthus protruding rib is perpendicular to the conveying passage toform a stop surface; one surface, opposite to the stop surface, and theconveying passage form an angle greater than 90 degrees and less than180 degrees so as to form a derivation surface.

Compared with the conventional technology, the valuable documentidentification device has the following advantages.

By providing acanthus-shaped protruding ribs on the working surface ofthe arc-shaped stacking plate, the acanthus-shaped protruding ribs havea one-way transmission property for the sheet-type media and each of theacanthus-shaped protruding ribs has the derivation surface and the stopsurface, thus the sheet-type media may only be transmitted along onedirection and the movement thereof is irreversible, which effectivelysolves the problem of wriggling and draw backing of the sheet-type mediacaused by the rebound action of the conveyor belt, and the stacking ofthe sheet-type medias may reach the expected effect.

BRIEF DESCRIPTION OF THE DRAWINGS

The present application is further described in conjunction withaccompany figures and embodiments.

FIG. 1 is a schematic view showing the structure of a sheet-type mediastacking device according to the present application;

FIG. 2 is a schematic view of a stacking and withdrawing device of thesheet-type media stacking device in FIG. 1;

FIG. 3 is a partial schematic view of a reversing device of the stackingand withdrawing device in FIG. 2;

FIG. 4 is a side view of the reversing device in FIG. 3;

FIG. 5 is a schematic view showing the depositing and withdrawingprocess of the sheet-type media stacking device in FIG. 1;

FIG. 6 is a side view showing the stacking and withdrawing device inFIG. 2 with a movable blocking plate in an open state and a reversingdevice at a second position;

FIG. 7 is an axonometric view of the stacking and withdrawing device inFIG. 2;

FIG. 8 is a side view of a first conveyor belt assembly of the stackingand withdrawing device in FIG. 2;

FIG. 9 is an axonometric view of a second conveyor belt assembly and athird conveyor belt assembly of the stacking and withdrawing device inFIG. 2;

FIG. 10 is a side view of the second conveyor belt assembly and thethird conveyor belt assembly of the stacking and withdrawing device inFIG. 2;

FIG. 11 is a side view of the second conveyor belt assembly and thethird conveyor belt assembly of the stacking and withdrawing device inFIG. 2 when the floating support is at a second position;

FIG. 12 is a flow diagram showing the stacking and withdrawing deviceconveying a first sheet of banknote and a second sheet of banknote;

FIG. 13 is a schematic view of a control system of the sheet-type mediastacking device in FIG. 1;

FIG. 14 is a schematic view showing sheet-type media at the position ofacanthus-shaped protruding ribs of the arc-shaped stacking plate in thestacking process;

FIG. 15 is a schematic view showing banknotes being stacked and alignedin the stacking and withdrawing device in FIG. 2; and

FIG. 16 is a schematic view showing a whole stack of banknotes beingdelivered out by the stacking and withdrawing device in FIG. 2.

DETAILED DESCRIPTION

For further describing the sheet-type media stacking device according tothe present application and for more clearly illustrating the structureand operation process of the device, a deposit machine used in afinancial self-service equipment is described as an example. Apparently,the described embodiments are only a part of the embodiments of thepresent application, rather than all embodiments. Based on theembodiments in the present application, all of other embodiments, madeby the person skilled in the art without any creative efforts, fall intothe scope of the present application.

Reference is made to FIG. 1, which is a schematic view showing thestructure of a sheet-type media stacking device (a deposit machine). Thedeposit machine has a depositing port 101, a sheet separating device 1,a sheet tilt correction device 2, a sheet identifying device 3, atemporary storage device 4, a stacking and withdrawing device 5 and astorage box 6. The sheet separating device 1 separates banknotes at thedepositing port 101 piece by piece and delivers the separated banknotesinto the deposit machine. The sheet tilt correction device 2 isconfigured to adjust the banknotes inclined with respect to an advancingdirection and align the banknotes with a datum plane in parallel withthe advancing direction. The sheet identifying device 3 is configured toidentify the authenticity, the face value, the obverse and reverse, andthe condition of banknotes and checks, to detect whether the sheets areconveyed abnormally, such as being titled, overlapped or continuous, todetermine whether the sheets can be stored. The temporary storage device4 is configured to temporarily store banknotes or checks which areidentifiable and are determined as not being conveyed abnormally. Thestacking and withdrawing device 5 is configured to stack banknotes orchecks, to deliver out returned banknotes or checks, and to withdraw[11]the banknotes or checks that customers forget to withdraw. Conveyingmechanisms 102, 103, 104 and 105 for conveying sheet-type media piece bypiece are provided between the above devices to convey banknotes.

Reference is made to FIG. 2. The stacking and withdrawing device 5includes an upper conveyor belt 153 configured to provide a drivingforce to the sheet-type media, an arc-shaped stacking plate forsupporting the sheet-type media, a movable blocking mechanism 20 forselectively blocking the sheet-type media, a sensor device 17 and acontrol unit. The upper conveyor belt 153 is arranged around a drivingtransmission shaft 151 and a driven transmission shaft 156 which arearranged in a conveying direction of the sheet-type media. Thearc-shaped stacking plate includes three sections. The section, near theconveying mechanism for conveying sheet-type media piece by piece, formsa rear arc-shaped plate 18. The section near an outlet for media forms afront arc-shaped plate 19. And the middle section forms a reversingdevice 25. The upper conveyor belt fits closely to the arc-shapedsurface of the arc-shaped stacking plate, thereby forming a conveyingpassage for the sheet-type media. The length of the conveying passage isat least greater than the length of one sheet of the sheet-type mediumin the conveying direction. One end of the conveying passage abuts theconveying mechanism 105 for conveying sheet-type media piece by pieceand is slightly lower than a delivering outlet of the conveyingmechanism. The other end of the conveying passage forms the outlet for awhole stack of sheet-type media. The movable blocking mechanism 20 isarranged on a section of the conveying passage close to the outlet. Thesensor device 17 is arranged at the tail end of the delivering outlet ofthe conveying mechanism for conveying sheet-type media piece by pieceand is configured to detect the arrival and passing of a sheet of thesheet-type medium. The control unit is configured to control the upperconveyor belt 153 to move or stop moving according to the informationfeedback from the sensor device 17, thereby connecting the adjacentsheet-type media, entering into the arc-shaped stacking device, end toend. For facilitating discharging or recycling the whole stack ofsheet-type media, a first conveyor belt assembly 15 is providedcorresponding to the upper conveyor belt 153, a second conveyor beltassembly 22 is provided corresponding to the front arc-shaped plate 19,and a third conveyor belt assembly 23 is provided corresponding to thereversing device 25, in view of the three-section design of thearc-shaped plate.

Combining FIG. 3 with FIG. 4, an acanthus-shaped protruding rib 252 isprovided on a working surface 251 of the reversing device 25 in thearc-shaped stacking plate, the acanthus-shaped protruding rib 252 allowsthe sheet-type media to pass only in a discharging direction.Preferably, in this embodiment, two acanthus-shaped protruding ribs 252are provided and are arranged in a front-rear order along thedischarging direction of the sheet-type media. One surface, facing tothe movable blocking mechanism 20, of each of the acanthus-shapedprotruding ribs 252 is perpendicular to the conveying passage to form astop surface 254, and an angle which is greater than 90 degrees and lessthan 180 degrees is formed between one surface of each of theacanthus-shaped protruding ribs 252 opposite to the stop face 254 andthe conveying passage to form a derivation surface 253. Theacanthus-shaped protruding ribs 252 added on the working surface 251effectively solve the problem that the sheet-type media wriggle and drawback due to the rebound action of the conveyor belt, thus the stackingof the sheet-type media may reach the expected effect.

Referring to FIG. 1, the specific working process of the deposit machineis illustrated herein. When depositing, a customer puts one or moresheets of banknotes at the depositing port 101, and the banknotes areseparated by the sheet separating device 1 piece by piece and thenpasses through the sheet tilt correction device 2 and the sheetidentifying device 3. The banknotes determined to be normal and the facevalue of which has been identified or the checks which are identifiableenter into the temporary storage device 4 via a route 102. The banknotesor checks which are unidentifiable are returned to the stacking andwithdrawing device 5 via a route 103 and a route 105, and then arealigned and stacked at the stacking unit 51, and the returned banknotesare stacked and then delivered out after the banknotes at the depositingport 101 are completely separated. When it is determined that thereturned banknotes or checks are not withdrawn by the operator in aspecified time, the banknotes or checks are recycled to the recyclingunit 52.

Referring to FIG. 5, the banknotes depositing process and returningprocess of the deposit machine are described herein. After the banknotesare completely separated piece by piece, the banknotes detecteddetermined to be normal and the face value of which has been identifiedare conveyed into the temporary storage device 4 to wait for thebanknote depositing confirmation of a customer. If the customer confirmsdepositing, the banknotes are conveyed out of the temporary storage 4and then conveyed into the storage box 6 via a route 104, therebyimplementing the banknotes depositing process. If the customer cancelsdepositing, the banknotes are conveyed out of the temporary device 4 andconveyed to the stacking and withdrawing device 5 via the route 105, andthen are aligned and stacked in the stacking unit 51, and finally arestacked and then delivered out, thereby implementing the banknotesreturning process. When it is determined that the returned banknotes arenot withdrawn by the customer in a specific time, the banknotes arerecycled to the recycling unit 52.

Reference is made to FIG. 2 and FIG. 6. The banknotes are returned viathe route 105 and are clamped between an upper delivering conveyor belt11 and a lower delivering conveyor belt 12 piece by piece to be conveyedto the stacking and withdrawing device 5. An upper guiding board 13 anda lower guiding board 14 are arranged in the advancing direction of thedischarged banknotes. The first conveyor belt assembly 15 arranged inparallel to the advancing direction of the banknotes is provided infront (the rightward direction in the figures) of the upper guidingboard 13. A first sensor device 17 is arranged between the drivingroller 151 and the delivering roller 16, and is configured to detecteach sheet of discharged banknote. The rear arc-shaped plate 18, thefront arc-shaped plate 19 and the reversing device 25 which have similarcurvatures are provided below the first conveyor belt assembly 15, and arear-end plane 181 of the rear arc-shaped plate 18 is obviously lowerthan the outlet (a port for discharging the banknotes) formed betweenthe upper delivering conveyor belt 11 and the lower delivering conveyorbelt 12. Above the front section of the front arc-shaped plate 19, themovable blocking plate 20 is pivotally mounted on a mandrel 152 and hastwo working states, including a closed state as shown in FIG. 2 and anopen state as shown in FIG. 6. A second sensor device 21 is fixed infront of the movable blocking plate 20 and is configured to detect thepresence of banknotes in front of the movable blocking plate 20 andabove the front arc-shaped plate 19. The adjustable second conveyor beltassembly 22 is arranged below the front arc-shaped plate 19, and thethird conveyor belt assembly 23 is arranged at a corresponding positionat the rear end of the second conveyor belt assembly 22. The firstconveyor belt assembly 15, the second conveyor belt assembly 22 and thethird conveyor belt assembly 23 are driven by the same power. A storagecontainer 24 is arranged below the recycling unit 52, and an inlet ofthe storage container 24 is corresponding to a conveying port formed bya recycling floating roller 221 of the second conveyor belt assembly 22and a driving roller 231 of the third conveyor belt assembly 23. Thereversing device 25 is arranged between the rear arc-shaped plate 18 andthe front arc-shaped plate 19 and above the conveying port formed by therecycling floating roller 221 and the driving roller 231, and ispivotally mounted on a mandrel 26, and has two working states, includinga first position as shown in FIG. 2 and a second position as shown inFIG. 6.

Referring to FIG. 7 and FIG. 8, the first conveyor belt assembly 15 isillustrated in detail. A first conveyor belt 153 (that is the upperconveyor belt) of the first conveyor belt assembly 15 is arranged aroundthe driving roller 151, a roller 154, a roller 155 and the pinch roller156. The lower section of the first conveyor belt 153 is tensed by theupper surfaces of the rear arc-shaped plate 18 and the front arc-shapedplate 19. The pinch roller 156 is fixed at the front end of the pressingplate 158 via a mandrel 157, and the pressing plate 158 is swingablearound the mandrel 152.

Referring to FIGS. 9 to 11, the second conveyor belt assembly and thethird conveyor belt assembly of the stacking and withdrawing device areillustrated. Two abreast second conveyor belts 222 of the secondconveyor belt assembly 22 are arranged around the recycling floatingroller 221, the second driving roller 223, a second pinch roller 224 anda tensioning roller 225. The second pinch roller 224 is directed to thepinch roller 156 of the first conveyor belt assembly 15. The recyclingfloating roller 221 is mounted on a recycling floating support 226through a pair of bearings and is swingable around a mandrel 227. Abanknote-delivering floating support 229 swingable around a mandrel 228is mounted at a front end of the second conveyor belt assembly 22, andhas two working states, including a first position as shown in FIG. 10and a second position as shown in FIG. 11. The swinging of thedelivering floating support 229 and the movable blocking plate 20 aredriven by the same power. The delivering floating support 229 isprovided with two rows of roller sets 230 corresponding to the secondconveyor belt 222. The roller sets 230 may make the working surface ofthe second conveyor belt 222 higher or lower than the upper arc-shapedsurface of the front arc-shaped plate 19 through the swinging of thedelivering floating support 229. A third conveyor belt 233 of the thirdconveyor belt assembly 23 is arranged around a third driving roller 232and the third driven roller 231.

Referring to FIGS. 12 to 16, the process for realizing the function ofthe stacking and withdrawing device is illustrated. When the banknotesare to be returned, the movable blocking plate 20 is in the closed stateas shown in FIG. 12, to prevent the banknotes from moving in theadvancing direction of banknotes. The delivering floating support 229 isin the first position, to make the working surface of the upper sectionof the second conveyor belt 222 lower than the upper arc-shaped surfaceof the front arc-shaped plate 19, thus, when slipping along thearc-shaped plate, the banknotes will not contact the working surface ofthe second conveyor belt 222. The reversing device 25 is in the firstposition, to allow the banknotes to pass along the arc-shaped surfacesmoothly. The first sheet of banknote 27 is delivered out by the upperdelivering conveyor belt 11 and the lower delivering conveyor belt 12,the front end of the banknote passes through the first sensor device 17(an acquisition module), the sensor 17 feeds back an information to aprocessing module of the control system, and the processing moduleprocesses the information and then sends out a signal, to start a firstdriving motor (an execution module) immediately or start the firstdriving motor after a period of time, thereby driving the first conveyorbelt assembly 15, the second conveyor belt assembly 22 and the thirdconveyor belt assembly 23 to rotate in the direction shown in FIG. 12.The first conveyor belt assembly 15 cooperates with the rear arc-shapedplate 18 to convey the banknote forward, the sensor 17 feeds back aninformation to the processing module of the control system when the tailend of the banknote leaves the first sensor device 17, and theprocessing module processes the information and sends out a signal tostop the first driving motor, and in this case, all of the conveyor beltassemblies are stopped, the banknote stops at position 182 with the tailend being exposed behind the first conveyor belt assembly 15. When thesecond sheet of banknote 28 is delivered out, the front end of thesecond sheet of banknote passes through the first sensor device 17, thefirst sensor device 17 feeds back an information to the control system,and the control system sends out a signal for starting the first drivingmotor, to start the first driving motor immediately or after a period oftime, thereby driving the first conveyor belt assembly, the secondconveyor belt assembly and the third conveyor belt assembly to rotate inthe direction shown in FIG. 13. The front end of the second sheet ofbanknote 28 is superposed on the tail end of the first sheet of banknote27, and the two sheets of banknotes which are partially overlapped areconveyed forward together by the first conveyor belt assembly 15. Afterthe tail end of the second sheet of banknote leaves the first sensordevice 17, the first sensor device 17 feeds back information to thecontrol system, and the control system stops the first driving motor,and the second sheet of banknote stops at the position 182. The thirdsheet of banknote and the subsequent banknotes are conveyed in the samemanner, in which the front end of a subsequent sheet of banknote issuperposed on the tail end of a previous sheet of banknote. When thefront end of the first sheet of banknote 27 reaches the movable blockingplate 20, the banknote is prevented from moving forward, a bottomsurface of the first sheet of banknote 27 fits closely to theacanthus-shaped protruding ribs 252 of the reversing device 25, the tailend of the banknote is blocked by the stop surface 254, the banknoteslips with respect to the first conveyor belt 153, and the first sheetof banknote 27 is blocked in the wriggling direction, thus may notwriggle and draw back. As shown in FIG. 15, the third sheet of banknoteand the subsequent banknotes go through the same process, and the frontends thereof are eventually aligned to the movable blocking plate 20.

After all of the banknotes are delivered out, that is, the banknoteshave been processed, the control system sends out a signal to controlthe second motor, to shift the movable blocking plate 20 to the openstate as shown in FIG. 16, thereby removing the blockage in theadvancing direction of the banknotes. Meanwhile, the delivering floatingsupport 229 is shifted to the second position to make the workingsurface of the second conveyor belt 222 higher than the upper arc-shapedsurface of the front arc-shaped plate 19, thus the working surface ofthe second conveyor belt 222 is in contact with the banknotes. The firstdriving motor is started to drive the first conveyor belt assembly, thesecond conveyor belt assembly and the third conveyor belt assembly torotate in the direction shown in FIG. 16. The banknotes are clampedbetween the first conveyor belt assembly 15 and the second conveyor beltassembly 22 to be delivered out, and the pressing plate 158 mayautomatically adjust the gap between the pinch roller 156 and the secondpinch roller 224 according to the total thickness of the banknotes.According to the time counting of the controlling program, thetransmission structure stops the conveyor belts when the banknotes aredelivered out for a certain distance, and the tail ends of the banknotesare clamped between the pinch roller 156 and the second pinch roller224, thereby accomplishing the delivering process. In the case that thewhole stack of the delivered banknotes haven't been withdrawn by theoperator timely, the movable blocking plate 20 and the reversing device25 of the stacking and withdrawing device are shifted to the position asshown in FIG. 7, the control system controls the first conveyor beltassembly, the second conveyor belt assembly and the third conveyor beltassembly to rotate in the reversed direction, and the whole stack ofbanknotes are conveyed reversely under the action of the first conveyorbelt assembly and the second conveyor belt assembly and guided into therecycling box 52 by the reversing device 25 in the reverse conveyingprocess.

The embodiments described hereinabove are only preferred embodiments ofthe present application, and should not be interpreted as limitation tothe present application. The technical solutions claimed by the presentapplication not only can be applied to the financial field forprocessing banknotes, but also can process checks or other whole stackof sheet-type media which are required to be separated piece by piece.Therefore, for those skilled in the art, a few of modifications andimprovements may be made without departing from the spirit and scope ofthe present application, and these modifications and improvements arealso deemed to fall into the scope of the present application.

1. A sheet-type media stacking device, comprising: a piece-by-piecesheet-type media conveying mechanism configured to convey sheet-typemedia piece by piece; an upper conveyor belt, arranged around a drivingtransmission shaft and driven transmission shaft which are arranged in aconveying direction of the sheet-type media, configured to provide adriving force to the sheet-type media; an arc-shaped stacking plateconfigured to support the sheet-type media, wherein an arc-shapedsurface, fitting closely to the upper conveyor belt, of the arc-shapedstacking plate defines a conveying passage for the sheet-type media, alength of the conveying passage is at least greater than a length of onesheet of the sheet-type medium in the conveying direction, and one endof the conveying passage abuts the piece-by-piece sheet-type mediaconveying mechanism and is slightly lower than a delivering outlet ofthe conveying mechanism, and another end of the conveying passage formsan outlet for a whole stack of sheet-type media; a movable blockingmechanism arranged on a section of the conveying passage close to theoutlet and configured to selectively block the sheet-type media; asensor device arranged at a tail end of the delivering outlet of thepiece-by-piece sheet-type media conveying mechanism and configured todetect the arrival and passing of a sheet of the sheet-type medium; anda control unit configured to control the upper conveyor belt to move orstop moving according to information feedback from the sensor device;wherein, an acanthus-shaped protruding rib is arranged at a position, ata distance of a length of one sheet of the sheet-type medium from themovable blocking mechanism, on the arc-shaped surface of the arc-shapedstacking plate, and the acanthus-shaped protruding rib allows thesheet-type media to pass only in a discharging direction.
 2. Thesheet-type media stacking device according to claim 1, wherein thenumber of the acanthus-shaped protruding rib is at least two, and the atleast two acanthus protruding ribs are arranged in a front-rear orderalong the discharging direction of the sheet-type media.
 3. Thesheet-type media stacking device according to claim 1, wherein thearc-shaped stacking plate comprises the following three sections,wherein a section near the piece-by-piece sheet-type media conveyingmechanism forms the rear arc-shaped plate, a section near the outletforms the front arc-shaped plate, and a middle section forms thereversing device.
 4. The sheet-type media stacking device according toclaim 3, wherein a recycling conveyor belt assembly and a dischargingconveyor belt assembly are arranged below the reversing device and thefront arc-shaped plate, wherein at least a section of the recyclingconveyor belt assembly fits with a section of the discharging conveyorbelt assembly to form a recycling conveying passage for the sheet-typemedia.
 5. The sheet-type media stacking device according to claim 1,wherein one surface, facing to the movable blocking mechanism, of theacanthus protruding rib is perpendicular to the conveying passage toform a stop surface; one surface, opposite to the stop surface, and theconveying passage form an angle greater than 90 degrees and less than180 degrees so as to form a derivation surface.
 6. The sheet-type mediastacking device according to claim 2, wherein one surface, facing to themovable blocking mechanism, of the acanthus protruding rib isperpendicular to the conveying passage to form a stop surface; onesurface, opposite to the stop surface, and the conveying passage form anangle greater than 90 degrees and less than 180 degrees so as to form aderivation surface.
 7. The sheet-type media stacking device according toclaim 3, wherein one surface, facing to the movable blocking mechanism,of the acanthus protruding rib is perpendicular to the conveying passageto form a stop surface; one surface, opposite to the stop surface, andthe conveying passage form an angle greater than 90 degrees and lessthan 180 degrees so as to form a derivation surface.
 8. The sheet-typemedia stacking device according to claim 4, wherein one surface, facingto the movable blocking mechanism, of the acanthus protruding rib isperpendicular to the conveying passage to form a stop surface; onesurface, opposite to the stop surface, and the conveying passage form anangle greater than 90 degrees and less than 180 degrees so as to form aderivation surface.